<%@ page language="java" contentType="text/html; charset=UTF-8"
	pageEncoding="UTF-8"%>

<%@ page import="java.util.*,java.io.*"%>

<%@ page import="java.text.SimpleDateFormat"%>

<%@ page import="org.apache.commons.fileupload.*"%>

<%@ page import="org.apache.commons.fileupload.disk.*"%>

<%@ page import="org.apache.commons.fileupload.servlet.*"%>

<%@ page import="org.json.simple.*"%>

<%@ page
	import="org.apache.struts2.dispatcher.multipart.MultiPartRequestWrapper"%>



<%

//文件保存目录路径   

//D:\Tomcat6.0\webapps\zswz\attached/

String savePath = request.getSession().getServletContext().getRealPath("/") +"attached/";

//文件保存目录URL /zswz/attached/

String saveUrl = request.getContextPath() +"/attached/";

//定义允许上传的文件扩展名

//定义允许上传的文件扩展名

HashMap<String, String> extMap =new HashMap<String, String>();

extMap.put("image","gif,jpg,jpeg,png,bmp");

extMap.put("flash","swf,flv");

extMap.put("media","swf,flv,mp3,wav,wma,wmv,mid,avi,mpg,asf,rm,rmvb");

extMap.put("file","doc,docx,xls,xlsx,ppt,htm,html,txt,zip,rar,gz,bz2");

 

//允许最大上传文件大小 struts.xml struts.multipart.maxSize=3G

long maxSize = 3000000000l;

 

response.setContentType("text/html; charset=UTF-8");

 

if(!ServletFileUpload.isMultipartContent(request)){

    out.println(getError("请选择文件。"));

    return;

}

//检查目录

File uploadDir =new File(savePath);

if(!uploadDir.isDirectory()){

    out.println(getError("上传目录不存在。"));

    return;

}

//检查目录写权限

if(!uploadDir.canWrite()){

    out.println(getError("上传目录没有写权限。"));

    return;

}

 

String dirName = request.getParameter("dir");//image

if (dirName ==null) {

    dirName ="image";

}

if(!extMap.containsKey(dirName)){

    out.println(getError("目录名不正确。"));

    return;

}

//创建文件夹

savePath += dirName +"/";//D:\Tomcat6.0\webapps\zswz\attached/image/

saveUrl += dirName +"/";///zswz/attached/image/

File saveDirFile =new File(savePath);

if (!saveDirFile.exists()) {

    saveDirFile.mkdirs();

}

SimpleDateFormat sdf =new SimpleDateFormat("yyyyMMdd");

String ymd = sdf.format(new Date());

savePath += ymd +"/";//D:\Tomcat6.0\webapps\zswz\attached/image/20111129/

saveUrl += ymd +"/";///zswz/attached/image/20111129/

File dirFile =new File(savePath);

if (!dirFile.exists()) {

    dirFile.mkdirs();

}

if (!dirFile.isDirectory()) {

    out.println(getError("上传目录不存在 。"));

    return;

}

//检查目录写入权限

if (!dirFile.canWrite()) {

    out.println(getError("上传目录没有写入权限。"));

    return;

}

 

//Struts2 请求 包装过滤器

MultiPartRequestWrapper wrapper = (MultiPartRequestWrapper) request;

//获得上传的文件名

String fileName = wrapper.getFileNames("imgFile")[0];//imgFile,imgFile,imgFile

//获得文件过滤器

File file = wrapper.getFiles("imgFile")[0];

 

//检查扩展名

String fileExt = fileName.substring(fileName.lastIndexOf(".") +1).toLowerCase();

if(!Arrays.<String>asList(extMap.get(dirName).split(",")).contains(fileExt)){

    out.println(getError("上传文件扩展名是不允许的扩展名。\n只允许" + extMap.get(dirName) +"格式。"));

    return;

}

//检查文件大小

if (file.length() > maxSize) {

        out.println(getError("上传文件大小超过限制。"));

        return;

}

 

 

//重构上传图片的名称

SimpleDateFormat df =new SimpleDateFormat("yyyyMMddHHmmss");

String newImgName = df.format(new Date()) +"_"

                +new Random().nextInt(1000) +"." + fileExt;

byte[] buffer =new byte[1024];

//获取文件输出流

FileOutputStream fos =new FileOutputStream(savePath +"/" + newImgName);

//获取内存中当前文件输入流

InputStream in =new FileInputStream(file);

try {

        int num =0;

        while ((num = in.read(buffer)) >0) {

                fos.write(buffer,0, num);

        }

}catch (Exception e) {

        e.printStackTrace(System.err);

}finally {

        in.close();

        fos.close();

}

//发送给 KE

JSONObject obj =new JSONObject();

obj.put("error",0);

obj.put("url", saveUrl +"/" + newImgName);

///zswz/attached/image/20111129/  image 20111129195421_593.jpg

out.println(obj.toJSONString());

%>

<%!

private String getError(String message) {

    JSONObject obj =new JSONObject();

    obj.put("error",1);

    obj.put("message", message);

    return obj.toJSONString();

}

%>